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Method for upgrading and reusing catalyst fine powder in methanol to olefins reaction

A technology for methanol to olefins and catalysts, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of catalyst recovery, waste, active component destruction, etc., achieve catalytic performance recovery, and reduce manufacturing costs. , to achieve the effect of reuse

Active Publication Date: 2018-05-04
CHIA TAI ENERGY MATERIALS DALIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent CN1207097C reports that the catalyst fine powder recovered by partial circulating fluidization reaction is mixed with some SAPO-34 molecular sieves, binders, carriers, and peptizers to form a uniform slurry, and then the methanol-to-olefins catalyst is prepared by a spray drying process. The recovery and application of the catalyst are beneficial to minimize waste, thereby reducing environmental and economic constraints, but the patent does not consider the fine catalyst powder containing carbon deposits, binders and other components, and the distribution of these components in the fine catalyst powder is different Larger, without treatment, the catalyst prepared by mixing and spraying with SAPO-34 molecular sieve, binder, carrier, etc. cannot achieve the strength and catalytic performance of the original catalyst
However, in the reaction of methanol to olefins, the catalyst is exposed to a harsh hydrothermal environment for a long time, and the structure of the active component SAPO-34 molecular sieve will be partially destroyed, and the recovery of the catalyst performance cannot be truly achieved through the above methods

Method used

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  • Method for upgrading and reusing catalyst fine powder in methanol to olefins reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 20 grams of catalyst fine powder, and give a particle size distribution of 30 μm for D50, 50 to 80 μm, and 60 μm for D90, (the catalyst fine powder is an industrial sample provided by Ningxia Baofeng Energy Group Co., Ltd., and the catalyst molar ratio is composed of :SiO2 2 :Al 2 o 3 :P 2 o 5 : C=0.5:1.0:0.7:0.11) roasting at 600°C for 1.5 hours;

[0024] (2) Put the calcined catalyst fine powder into a high-pressure crystallization kettle, and add 13 grams of silica sol (SiO 2 Mass fraction 25%), 42 grams of pseudo-boehmite (Al 2 o 3 Mass percent 65%), 75 grams of phosphoric acid (P 2 o 5 61% by mass), 98 grams of triethylamine, 195 grams of deionized water, crystallized at 190°C for 20 hours, centrifuged and washed to obtain the product;

[0025] (3) The resulting product is mixed with 120 grams of deionized water, 65 grams of silica sol (SiO 2 mass fraction 40%), 60 grams of kaolin (water content is 15wt%) mixed to obtain the slurry, after stirri...

Embodiment 2

[0027] (1) Weigh 230 grams of fine catalyst powder (the particle size distribution is 30 μm for D50, and 55 μm for D90, the fine catalyst powder is an industrial sample provided by Ningxia Baofeng Energy Group Company, and the catalyst molar ratio is composed of: SiO 2 :Al 2 o 3 :P 2 o 5 : C=0.1:1.0:0.6:0.12) roasting at 450°C for 5 hours;

[0028] (2) Put the calcined catalyst fine powder into a high-pressure crystallization kettle, and add 4 grams of white carbon black (SiO 2 Mass fraction 92%), 56 grams of pseudo-boehmite (Al 2 o 3 Mass percent 65%), 80 grams of phosphoric acid (P 2 o 5 mass percent 61%), 320 grams of tetraethylammonium hydroxide, 60 grams of deionized water, crystallized at 160° C. for 48 hours, centrifuged and washed to obtain the product;

[0029] (3) the resulting product is mixed with 160 grams of deionized water, 72 grams of aluminum sol (Al 2 o 3 mass percent 21%), 80 grams of kaolin (water content is 15wt%) mixed to obtain the slurry, after ...

Embodiment 3

[0031] (1) Weigh 260 grams of catalyst fine powder (the particle size distribution is 26 μm for D50 and 58 μm for D90, the catalyst fine powder is an industrial sample provided by Ningxia Baofeng Energy Group Company, and the catalyst molar ratio is composed of: SiO 2 :Al 2 o 3 :P 2 o 5 : C=0.3:1.0:0.7:0.09) baked at 500°C for 4 hours;

[0032] (2) Put the calcined catalyst fine powder into the high-pressure crystallization kettle, and add 25 grams of silica sol (SiO 2 Mass fraction 25%), 50 grams of pseudo-boehmite (Al 2 o 3 Mass percent 65%), 65 grams of phosphoric acid (P 2 o 5 mass percent 61%), 110 grams of morpholine, 240 grams of deionized water, crystallized at 200 ° C for 12 hours, centrifuged and washed to obtain the product;

[0033] (3) The resulting product is mixed with 130 grams of deionized water, 85 grams of aluminum sol (Al 2 o 3 mass percent 21%), 56 grams of kaolin (water content is 15wt%) mixed to obtain the slurry, after stirring, grinding, mold...

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Abstract

The invention discloses a quality improvement and recycle method of fine catalyst powder for a methanol-based olefin preparation reaction. The method comprises 1, roasting fine catalyst powder to remove carbon deposit in the fine catalyst powder, 2, mixing the roasted fine catalyst powder, a silicon source, an aluminum source, a phosphorus source, an organic amine template and deionized water, or adding the roasted fine catalyst powder into a SAPO-34 molecular sieve crystallization raffinate to obtain a mixture, and carrying out crystallization and centrifugation to obtain a product, and 3, mixing the product, deionized water, a binder and a matrix to obtain slurry, carrying out stirring, grinding and spray molding and carrying out roasting to obtain the catalyst microspheres for methanol-based olefin preparation. The quality improvement and recycle method has the advantages of high catalytic activity after regeneration, good selectivity and high strength.

Description

technical field [0001] The invention relates to a method for upgrading and reusing fine catalyst powder in methanol-to-olefins reaction. Background technique [0002] Methanol-to-olefins technology (hereinafter referred to as MTO technology) is a high-end core technology in the field of energy and chemical industry in the world. It uses methanol made from coal or natural gas as a raw material, which is processed and transformed into an important chemical raw material - light olefins (ethylene and propylene) through MTO technology, and then a large number of olefin chemical products are derived. In view of my country's national conditions of "short of oil, less gas and rich in coal", this is a revolutionary industrial technology to replace oil with coal. Become the core technology of the country's major energy strategy. However, the core of this type of technology lies in the catalyst. Since the reaction of methanol to olefins is carried out in a fluidized bed reactor, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85B01J29/90C07C1/20C07C11/04C07C11/06
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 李晓峰狄春雨刘环昌陈文勇明曰信梁光华王龙窦涛
Owner CHIA TAI ENERGY MATERIALS DALIAN
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